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                                <h1 id="risc-v-&#x76F8;&#x5173;&#x4FE1;&#x606F;">RISC-V &#x76F8;&#x5173;&#x4FE1;&#x606F;</h1>
<p>RISC-V &#x662F;&#x4E00;&#x4E2A; RISC &#x6307;&#x4EE4;&#x96C6;&#x67B6;&#x6784;&#xFF0C;&#x4F60;&#x5B9E;&#x73B0;&#x7684;&#x7F16;&#x8BD1;&#x5668;&#x8981;&#x7F16;&#x8BD1;&#x5230; RISC-V &#x6C47;&#x7F16;&#x3002;</p>
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<h2 id="risc-v-&#x5DE5;&#x5177;&#x4F7F;&#x7528;">RISC-V &#x5DE5;&#x5177;&#x4F7F;&#x7528;</h2>
<p>&#x6211;&#x4EEC;&#x63D0;&#x4F9B;&#x9884;&#x5148;&#x7F16;&#x8BD1;&#x597D;&#x7684; RISC-V &#x5DE5;&#x5177;&#xFF0C;&#x5728;<a href="env.html">&#x73AF;&#x5883;&#x914D;&#x7F6E;</a>&#x4E2D;&#x5DF2;&#x7ECF;&#x53D9;&#x8FF0;&#x4E86;&#x5B89;&#x88C5;&#x548C;&#x4F7F;&#x7528;&#x65B9;&#x6CD5;&#x3002;
&#x4E0B;&#x9762;&#x6C47;&#x603B;&#x4E00;&#x4E0B;&#x3002;</p>
<p>&#x6CE8;&#x610F;&#xFF0C;&#x6211;&#x4EEC;&#x867D;&#x7136;&#x662F;&#x7528;&#x7684;&#x5DE5;&#x5177;&#x524D;&#x7F00;&#x662F; <code>riscv64</code>&#xFF0C;
&#x4F46;&#x6211;&#x4EEC;&#x52A0;&#x4E0A;&#x53C2;&#x6570; <code>-march=rv32im -mabi=ilp32</code> &#x4EE5;&#x540E;&#x5C31;&#x80FD;&#x7F16;&#x8BD1;&#x5230; 32 &#x4F4D;&#x6C47;&#x7F16; <sup><a href="#fn_1" id="reffn_1">1</a></sup>&#x3002;
&#x4F7F;&#x7528;&#x65F6;&#x8BB0;&#x5F97;&#x52A0;&#x8FD9;&#x4E2A;&#x53C2;&#x6570;&#xFF0C;&#x5426;&#x5219;&#x9ED8;&#x8BA4;&#x7F16;&#x8BD1;&#x5230; 64 &#x4F4D;&#x6C47;&#x7F16;&#x3002;</p>
<ul>
<li>gcc &#x7F16;&#x8BD1; <code>input.c</code> &#x5230;&#x6C47;&#x7F16; <code>input.s</code>&#xFF0C;&#x6700;&#x9AD8;&#x4F18;&#x5316;&#x7B49;&#x7EA7;</li>
</ul>
<pre><code class="lang-bash"><span class="hljs-comment"># input.c &#x7684;&#x5185;&#x5BB9;</span>
$ cat input.c
int <span class="hljs-function"><span class="hljs-title">main</span></span>(){<span class="hljs-built_in">return</span> 233;}

<span class="hljs-comment"># &#x7F16;&#x8BD1;&#x5230; input.s</span>
$ riscv64-unknown-elf-gcc -march=rv32im -mabi=ilp32 -O3 -S input.c

<span class="hljs-comment"># gcc &#x7684;&#x7F16;&#x8BD1;&#x7ED3;&#x679C;</span>
$ cat input.s
    .file    <span class="hljs-string">&quot;input.c&quot;</span>
    .option nopic
    .attribute arch, <span class="hljs-string">&quot;rv32i2p0_m2p0&quot;</span>
    .attribute unaligned_access, 0
    .attribute stack_align, 16
    .text
    .section    .text.startup,<span class="hljs-string">&quot;ax&quot;</span>,@progbits
    .align    2
    .globl    main
    .type    main, @<span class="hljs-keyword">function</span>
main:
    li    a0,233
    ret
    .size    main, .-main
    .ident    <span class="hljs-string">&quot;GCC: (SiFive GCC 8.3.0-2020.04.0) 8.3.0&quot;</span>
</code></pre>
<ul>
<li>gcc &#x7F16;&#x8BD1; <code>input.s</code> &#x5230;&#x53EF;&#x6267;&#x884C;&#x6587;&#x4EF6; <code>a.out</code></li>
</ul>
<pre><code class="lang-bash"><span class="hljs-comment"># input.s &#x7684;&#x5185;&#x5BB9;&#xFF0C;&#x5C31;&#x662F;&#x4E0A;&#x9762;&#x6C47;&#x7F16;&#x8F93;&#x51FA;&#x7684;&#x7B80;&#x5316;&#x7248;&#x672C;</span>
$ cat input.s
    .text
    .globl    main
main:
    li    a0,233
    ret

<span class="hljs-comment"># &#x7F16;&#x8BD1;&#x5230; a.out</span>
$ riscv64-unknown-elf-gcc -march=rv32im -mabi=ilp32 input.s

<span class="hljs-comment"># &#x8F93;&#x51FA;&#x7ED3;&#x679C;&#xFF0C;&#x80FD;&#x770B;&#x5230;&#x662F; 32 &#x4F4D;&#x7684; RISC-V &#x53EF;&#x6267;&#x884C;&#x6587;&#x4EF6;</span>
$ file a.out
a.out: ELF 32-bit LSB executable, UCB RISC-V, version 1 (SYSV), statically linked, not stripped
</code></pre>
<p>*&#x3010;Linux &#x7528;&#x6237;&#x3011;qemu &#x8FD0;&#x884C; <code>a.out</code>&#xFF0C;&#x83B7;&#x53D6;&#x8FD4;&#x56DE;&#x7801;</p>
<pre><code class="lang-bash"><span class="hljs-comment"># &#x8FD0;&#x884C; a.out</span>
$ qemu-riscv32 a.out

<span class="hljs-comment"># $? &#x662F; qemu &#x7684;&#x8FD4;&#x56DE;&#x7801;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x6211;&#x4EEC; main &#x6240; return &#x7684;&#x90A3;&#x4E2A;&#x503C;</span>
$ <span class="hljs-built_in">echo</span> $?
233
</code></pre>
<p>*&#x3010;macOS &#x7528;&#x6237;&#x3011;Spike &#x6A21;&#x62DF;&#x5668;&#x8FD0;&#x884C; <code>a.out</code>&#xFF0C;&#x83B7;&#x53D6;&#x8FD4;&#x56DE;&#x7801;</p>
<pre><code class="lang-bash"><span class="hljs-comment"># &#x8FD0;&#x884C; a.out</span>
$ spike --isa=RV32G /path/to/pk a.out
bbl loader

<span class="hljs-comment"># $? &#x662F; spike &#x7684;&#x8FD4;&#x56DE;&#x7801;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x6211;&#x4EEC; main &#x6240; return &#x7684;&#x90A3;&#x4E2A;&#x503C;</span>
$ <span class="hljs-built_in">echo</span> $?
233
</code></pre>
<hr>
<blockquote id="fn_1">
<sup>1</sup>. &#x8FD9;&#x91CC;&#x7684; <code>rv32im</code> &#x8868;&#x793A;&#x4F7F;&#x7528; RV32I &#x57FA;&#x672C;&#x6307;&#x4EE4;&#x96C6;&#xFF0C;&#x5E76;&#x5305;&#x542B; M &#x6269;&#x5C55;&#xFF08;&#x4E58;&#x9664;&#x6CD5;&#xFF09;&#x3002;&#x672C;&#x5B9E;&#x9A8C;&#x4E2D;&#x6211;&#x4EEC;&#x4E0D;&#x9700;&#x8981;&#x5176;&#x4ED6;&#x6269;&#x5C55;&#x3002;<a href="#reffn_1" title="Jump back to footnote [1] in the text."> &#x21A9;</a>
</blockquote>

                                
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